tc filter fw flowid and masks

Hi guys, when i mark a packet using, for example,
# iptables ...  -j MARK --set-mark 10
i can match it using
#tc filter add dev ... handle 10 fw flowid 1:10

But how can i match it using tc filter if the mark using iptables has a mask?
# iptables ... -j MARK --set-mark 10/0xff

The mark is needed because there are a few QOS scripts that set marks
using masks 0xff00.

When using maks i am always getting in to the default tc class.

Thanks!

[]'s
Salatiel